The product obtained by multiplying a number by 0.2 is 5.6 less than the original number. What is the number?
一个数乘0.2所得的积比原来的数小5.6，这个数是多少．
<gadget id="calculator">1 - 0.2</gadget>
<output>0.8</output>

<gadget id="calculator">5.6 / 0.8</gadget>
<output>7</output>

<result>7</result>