4 5 decimal

&[DATE] &[TIME] - &[FILENAME]

y f 1.486 0.012 / 5 0.5 y * + (y * (53 /^52 y * 1.25 sqrt * + (23 /^/ * 0.00023 sqrt * :

y f 20 ≡ y solve 12.33257 - 1.68641 21 mat

y f 20 ≡ y 1000 - 1000 solve 12.33254 - 1.68628 21 mat