That was awesome. I love how you allowed numbers to flow so smoothly into the narrative. The ‘race’ at the end was exciting as well.

The numbers are hardly noticeable they fit in so well! You did an awesome job building suspense in such a short space.

Okay, that was mean. Heck of a cliffhanger at the end there. Very nice stand-alone ficlet, challenge or now challenge.

Awesome. I agree with THX , that’s quite a cliffhanger at the end.
Small errors: the first sentence has awkward syntax. Consider rewording. Also, the word “its” when used as a possessive pronoun does not require the apostrophe. You only need it when you have the contraction of “it is.” (See your second paragraph, second sentence, second instance of “it’s”.)