Calculation: ((1*3*5+2*6*10+3*9*15+…+50*150*250)/(2*4*6+4*8*12+6*12*18+ ...+100*200*300)).
计算：((1*3*5+2*6*10+3*9*15+…+50*150*250)/(2*4*6+4*8*12+6*12*18+…+100*200*300))．
<gadget id="calculator">5 / 16</gadget>
<output>5/16 = around 0.3125</output>

<result>5/16 = around 0.3125</result>