"I'm not very good with numbers"

That's alright; the IRS's got this. Here's their "bureau-splain:"

"For this round, the IRS identified approximately 4.6 million taxpayers who may be due an adjustment. Of that number, approximately 4 million taxpayers are expected to receive a refund. The refund average is $1,265, which means some will receive more and some will receive less."

I sure am glad they explained that last part. I'm sure some would have been confused if their check wasn't exactly $1,265.