A number (6/7) is 2 less than the product of 18.5 and (4/5), find this number. (column equation solution)
一个数的(6/7)比18.5与(4/5)的积少2，求这个数．(列方程解答)
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">18.5 * (4/5)</gadget>
<output>14.8</output>

<gadget id="calculator">14.8 - 2</gadget>
<output>12.8</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">12.8 / (6/7)</gadget>
<output>14.933333</output>

<result>14.933333</result>