35% of a number is equal to 20% of 70, what is this number? (column equation solution)
一个数的35%等于70的20%，这个数是多少？(列方程解答)
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">70 * (1/5)</gadget>
<output>14</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">14 / (7/20)</gadget>
<output>40</output>

<result>40</result>