The number 1.6 less than twice the number is 13.4.
比多少的2倍少1.6的数是13.4．
<gadget id="calculator">13.4 + 1.6</gadget>
<output>15</output>

<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>