(2/3) of a number is 4 less than the smallest two-digit number. What is the number?
一个数的(2/3)比最小的两位数少4，这个数是多少．
<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 / (2/3)</gadget>
<output>9</output>

<result>9</result>