Text question: (4/5) of a number is 3 less than 60% of 15. What is this number?
文字题：一个数的(4/5)比15的60%少3，这个数是多少？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 * (3/5)</gadget>
<output>9</output>

<gadget id="calculator">9 - 3</gadget>
<output>6</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">6 / (4/5)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>