diff --git a/src/org/nwapw/abacus/tree/NumberNode.java b/src/org/nwapw/abacus/tree/NumberNode.java
index 41112e7..77dc7a1 100644
--- a/src/org/nwapw/abacus/tree/NumberNode.java
+++ b/src/org/nwapw/abacus/tree/NumberNode.java
@@ -22,19 +22,10 @@ public class NumberNode extends TreeNode {
 
     /**
      * Creates a new number node with the given double value.
-     * @param value the value to use.
+     * @param newNumber the number for which to create a number node.
      */
-    public NumberNode(double value){
-        number = new NaiveNumber(value);
-    }
-
-    /**
-     * Creates a new number node with the given string value, converted
-     * to a double.
-     * @param value the value.
-     */
-    public NumberNode(String value){
-        this(Double.parseDouble(value));
+    public NumberNode(NumberInterface newNumber){
+        this.number = newNumber;
     }
 
     /**
diff --git a/src/org/nwapw/abacus/tree/TreeBuilder.java b/src/org/nwapw/abacus/tree/TreeBuilder.java
index 9bc55de..83f2ebd 100644
--- a/src/org/nwapw/abacus/tree/TreeBuilder.java
+++ b/src/org/nwapw/abacus/tree/TreeBuilder.java
@@ -5,6 +5,8 @@ import org.nwapw.abacus.function.OperatorType;
 import org.nwapw.abacus.lexing.Lexer;
 import org.nwapw.abacus.lexing.pattern.Match;
 import org.nwapw.abacus.lexing.pattern.Pattern;
+import org.nwapw.abacus.number.NaiveNumber;
+import org.nwapw.abacus.number.PreciseNumber;
 
 import java.util.*;
 
@@ -170,7 +172,7 @@ public class TreeBuilder {
                 else return new UnaryPrefixNode(operator, applyTo);
             }
         } else if(matchType == TokenType.NUM){
-            return new NumberNode(Double.parseDouble(source.substring(match.getFrom(), match.getTo())));
+            return new NumberNode(new NaiveNumber(Double.parseDouble(source.substring(match.getFrom(), match.getTo()))));
         } else if(matchType == TokenType.FUNCTION){
             String functionName = source.substring(match.getFrom(), match.getTo());
             FunctionNode node = new FunctionNode(functionName);