0 the rule that says that if there are x ways in which one thing can be done, and y ways in which another thing can then be done, then there are x × y ways in which the two things can be done one after the other --
1 a rule that says if there are x ways in which one thing can be done, and y ways in which another thing can then be done, then there are x×y ways in which the two things can be done one after the other --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.
