((1*2*3+3*6*9+7*14*21)/(1*4*5+3*12*15+7*28*35)).
((1*2*3+3*6*9+7*14*21)/(1*4*5+3*12*15+7*28*35))．
<gadget id="calculator">1 * 2 * 3</gadget>
<output>6</output>

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

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

<gadget id="calculator">6 + 162 + 2_058</gadget>
<output>2_226</output>

<gadget id="calculator">1 * 4 * 5</gadget>
<output>20</output>

<gadget id="calculator">3 * 12 * 15</gadget>
<output>540</output>

<gadget id="calculator">7 * 28 * 35</gadget>
<output>6_860</output>

<gadget id="calculator">20 + 540 + 6_860</gadget>
<output>7_420</output>

<gadget id="calculator">2_226 / 7_420</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>