75% of a number is 120, what is 30% of this number?
一个数的75%是120，这个数的30%是多少．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">120 / (3/4)</gadget>
<output>160</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">160 * (3/10)</gadget>
<output>48</output>

<result>48</result>