explain

sorry ans is 10 to power 225

10^10*10^20*10^30

10^10*10^20*10^30*10^40*10^5*10^15*10^25*10^35*10^45

i got ans but need explanation...total zeros at the end of product 5^5 x 10^10 x 15^15 x 20^20 x 25^25 x 30^30 x 35^35 x 40^40 x 45^45 will be 5+10+15+20+50+30+35+40+45 = 250 zeros

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