Heyo! ;D
In order to solve this problem, we simply need to follow the rule of division.
140 ÷ 20 = 7
Hence, if your goal is to ride your bike 140 laps around your block over a 20 day period, you must ride your bike 7 total laps a day to do so.
Hope this helped! If so, please lmk! Tysm and good luck!