((1*2*3+2*4*6+3*6*9+…+200*400*600)/(1*3*5+2*6*10+3*9*16+…+ 200*600*1000))=how much.
((1*2*3+2*4*6+3*6*9+…+200*400*600)/(1*3*5+2*6*10+3*9*16+…+200*600*1000))=多少．
<gadget id="calculator">1 * 2 * 3</gadget>
<output>6</output>

<gadget id="calculator">1 * 3 * 5</gadget>
<output>15</output>

<gadget id="calculator">6 / 15</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>