A number is 4.8 less than its 2.8 times, what is this number?
一个数比它的2.8倍少4.8，这个数是多少？
<gadget id="calculator">2.8 - 1</gadget>
<output>1.8</output>

<gadget id="calculator">4.8 / 1.8</gadget>
<output>2.666667</output>

<result>2.666667</result>