Before you Google or Chegg the problem, give it a try. That's it.
Simple and clean: do not push that task aside! It's going to stress you out later, and you know it. Break the task into smaller tasks. Set realistic goals. Push through. You got this!
Please, please, please! Spend some extra time writing it out. Don't plug it straight into the calculator or do it in your head. You will most definitely mess up somehow, some way. Grab a whiteboard, a piece of paper, or even a napkin to write.