(2/3) of a number is 80, what is (1/10) of this number.
一个数的(2/3)是80，这个数的(1/10)是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">80 / (2/3)</gadget>
<output>120</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">120 * (1/10)</gadget>
<output>12</output>

<result>12</result>