diff --git a/main.js b/main.js
index 46f23be..d06d18f 100644
--- a/main.js
+++ b/main.js
@@ -70,21 +70,29 @@ function compute(queue, modulus) {
 	const stack = [];
 	for (const token of queue) {
 		if (typeof token === "bigint") {
-			stack.push(token % modulus);
+			stack.push(token);
 		} else if (token === "+") {
-			const [a, b] = binaryOpPop(stack);
+			let [a, b] = binaryOpPop(stack);
+			a %= modulus;
+			b %= modulus;
 			const c = (a + b) % modulus;
 			stack.push(c);
 		} else if (token === "-") {
-			const [a, b] = binaryOpPop(stack);
+			let [a, b] = binaryOpPop(stack);
+			a %= modulus;
+			b %= modulus;
 			const c = (a - b) % modulus;
 			stack.push(c);
 		} else if (token === "*") {
-			const [a, b] = binaryOpPop(stack);
+			let [a, b] = binaryOpPop(stack);
+			a %= modulus;
+			b %= modulus;
 			const c = (a * b) % modulus;
 			stack.push(c);
 		} else if (token === "/") {
-			const [a, b] = binaryOpPop(stack);
+			let [a, b] = binaryOpPop(stack);
+			a %= modulus;
+			b %= modulus;
 			const binv = modinv(b, modulus);
 			const c = (a * binv) % modulus;
 			stack.push(c);