The value is 735.
30
7*102
735
80% of 735 = 588= 80% * 735= 80%/100% * 735=5880/10= 588
735! = 2.2234781778053995436468186565572e+1789
735 rounded to the nearest ten is 740
735 ÷ 2 = 367.5
735! = 2.2234781778053995436468186565572e+1789
765
Try: 15 times 49 = 735
It is: 735 = DCCXXXV