5 times a number is 0.8 less than the product of 0.3 and 9. Find this number. (solution by equation)
一个数的5倍比0.3与9的积少0.8，求这个数．(用方程解)
<gadget id="calculator">0.3 * 9</gadget>
<output>2.7</output>

<gadget id="calculator">2.7 - 0.8</gadget>
<output>1.9</output>

<gadget id="calculator">1.9 / 5</gadget>
<output>0.38</output>

<result>0.38</result>