Calculation: ((1*2*3+2*4*6+4*8*12+7*4*21)/(1*3*5+2*6*10+4*12*20+7* 21*35)).
计算：((1*2*3+2*4*6+4*8*12+7*4*21)/(1*3*5+2*6*10+4*12*20+7*21*35))．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">2 * 4 * 8</gadget>
<output>64</output>

<gadget id="calculator">7 * 7 * 7</gadget>
<output>343</output>

<gadget id="calculator">1 + 8 + 64 + 343</gadget>
<output>416</output>

<gadget id="calculator">6 * 416</gadget>
<output>2_496</output>

<gadget id="calculator">15 * 416</gadget>
<output>6_240</output>

<gadget id="calculator">2_496 / 6_240</gadget>
<output>2/5 = around 0.4</output>

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