The difference between 9.42 and 2.7 is 0.12 less than twice a number. Find this number? (equation solution)
9.42减2.7的差比一个数的2倍少0.12，求这个数？(方程解)
<gadget id="calculator">9.42 - 2.7</gadget>
<output>6.72</output>

<gadget id="calculator">0.12 + 6.72</gadget>
<output>6.84</output>

<gadget id="calculator">6.84 / 2</gadget>
<output>3.42</output>

<result>3.42</result>