Simple calculation of 582 divided by 0.8 divided by 12.5

Simple calculation of 582 divided by 0.8 divided by 12.5

582÷0.8÷12.5
=582÷（0.8×12.5）
=582÷10
=58.2

How to do the simple algorithm of 3.363 divided by (1.2121 times 4)

363 divided by (1.121 times 4)
＝3.363/1.121/4
＝3/4
＝0.75

(at least two solutions) 1 / 71 divided by (1 / 8 + 1 / 24-7 / 36-1 / 72) + (1 / 8 + 1 / 24-7 / 36-1 / 72) divided by 1 / 72

1
1 / 71 divided by (1 / 8 + 1 / 24-7 / 36-1 / 72) + (1 / 8 + 1 / 24-7 / 36-1 / 72) divided by 1 / 72
=1 / 71 divided by (9 / 72 + 3 / 72-14 / 72-1 / 72) + (9 / 72 + 3 / 72-14 / 72-1 / 72) divided by 1 / 72
=1 / 71 divided by (- 3 / 72) + (- 3 / 72) divided by 1 / 72
=1/71*(-72/3)-3
=1/71*(-24)-3
=-3 and 24 / 71
2,
1 / 71 divided by (1 / 8 + 1 / 24-7 / 36-1 / 72) + (1 / 8 + 1 / 24-7 / 36-1 / 72) divided by 1 / 72
=1 / 71 divided by (9 / 72 + 3 / 72-14 / 72-1 / 72) + (1 / 8) divided by 1 / 72 + (1 / 24) divided by 1 / 72 - (7 / 36) divided by 1 / 72 - (1 / 72) divided by 1 / 72
=1 / 71 divided by (- 3 / 72) + 9 + 3-14-1
=1/71*(-72/3)-3
=1/71*(-24)-3
=-3 and 24 / 71

Type a Chinese character. Divide 30 days by 2, 72 hours, 24 hours
How many Chinese characters are there for each of the above questions~
Excuse me

1. Fat (half a month)
2. Crystal (3 days)
3. Old (one day)