If the number 0.2 less than 4 times a number is 5.8, what is the number?
比一个数的4倍少0.2的数是5.8，则这个数是多少．
<gadget id="calculator">5.8 + 0.2</gadget>
<output>6</output>

<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>