Simple operation of 1 * 3 * 5 + 2 * 6 * 10 + 5 * 15 * 25 / 1 * 5 * 9 + 2 * 10 * 18 + 5 * 25 * 45

Simple operation of 1 * 3 * 5 + 2 * 6 * 10 + 5 * 15 * 25 / 1 * 5 * 9 + 2 * 10 * 18 + 5 * 25 * 45

1*3*5+2*6*10+5*15*25/1*5*9+2*10*18+5*25*45
=1*(1*3*5)+2*(1*3*5)+5*(1*3*5)/1*(1*5*9)+2*(1*5*9)+5*(1*5*9)
=(1+2+5)*(1*3*5)/(1+2+5)*(1*5*9)
=1*3*5/1*5*9
=1/3