What is 1 × 2 × 3 × 100

What is 1 × 2 × 3 × 100


100!



What's 1:2 * 1:3 * 1:100
Write the formula with simple algorithm


Original formula = 3 / 2 + 4 / 3 + 5 / 4 + +101/100 = 101/2



1+2+3+… +99+100+99+… +What is the value of 3 + 2 + 1?


=2[(1+99)+(2+98)+(3+97)+…… +(48+52)+(49+51)]+50+50+100
=2*(100*49)+100+100
=2*(100*50)
=10000