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

<gadget id="calculator">2 * 4 * 6</gadget>
<output>48</output>

<gadget id="calculator">4 * 8 * 12</gadget>
<output>384</output>

<gadget id="calculator">6 + 48 + 384</gadget>
<output>438</output>

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

<gadget id="calculator">2 * 6 * 10</gadget>
<output>120</output>

<gadget id="calculator">4 * 12 * 20</gadget>
<output>960</output>

<gadget id="calculator">15 + 120 + 960</gadget>
<output>1_095</output>

<gadget id="calculator">438 / 1_095</gadget>
<output>2/5 = around 0.4</output>

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