Calculation: ((1*2*3+3*6*9+5*10*15+7*14*21)/(1*3*5+3*9*15+5*15*25+7* 21*35))=how much.
计算：((1*2*3+3*6*9+5*10*15+7*14*21)/(1*3*5+3*9*15+5*15*25+7*21*35))=多少．
<gadget id="calculator">1 * 2 * 3</gadget>
<output>6</output>

<gadget id="calculator">3 * 6 * 9</gadget>
<output>162</output>

<gadget id="calculator">5 * 10 * 15</gadget>
<output>750</output>

<gadget id="calculator">7 * 14 * 21</gadget>
<output>2_058</output>

<gadget id="calculator">6 + 162 + 750 + 2_058</gadget>
<output>2_976</output>

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

<gadget id="calculator">3 * 9 * 15</gadget>
<output>405</output>

<gadget id="calculator">5 * 15 * 25</gadget>
<output>1_875</output>

<gadget id="calculator">7 * 21 * 35</gadget>
<output>5_145</output>

<gadget id="calculator">15 + 405 + 1_875 + 5_145</gadget>
<output>7_440</output>

<gadget id="calculator">2_976 / 7_440</gadget>
<output>2/5 = around 0.4</output>

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