The ratio of the minuend to the difference is 9:7, if the minuend is 12, what is the minuend.
被减数和差的比是9：7，如果减数是12，则被减数是多少．
<gadget id="calculator">9 / 7</gadget>
<output>9/7 = around 1.285714</output>

<gadget id="calculator">(9/7) - 1</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">12 / (2/7)</gadget>
<output>42</output>

<gadget id="calculator">42 * (9/7)</gadget>
<output>54</output>

<result>54</result>