how to not convert numbers into hexadecimal?

I have this JS:

setInterval(sendHeartbeat, 1000 * 60 * 1);

When I pass it to the package, it transforms the 1000 * 60 * 1 into:

setInterval(sendHeartbeat, 0x3e8 * 0x3c * 0x1);

I don't find any options to keep the number as it