With a rough estimation.
Estimate the answer. If the calculated answer is close to the estimate then it is reasonable.
estimation
280
Well, honey, let me break it down for you. 727 times 44 is actually 31988, not 3198. So, no, 3198 is not a reasonable product for 727 times 44. But hey, we all make mistakes, no judgment here. Just double-check your math next time, darling.
pie
The judge applied the reasonable person standard to determine if the defendant's actions were justified in self-defense.
multiplication
to determine the product
Multiply the numbers
A reasonable estimate will give an indication of the order of magnitude of the number. The order of magnitude is determined by the decimal point and so knowing the order can help in placing it.
The desire, ability, and willingness to buy a product
Optimal product mix is at that point where net profit from thesales of that product mix is maximum.