What is the quotient of the difference of 20 minus 0.8 divided by the sum of 4 0.3?
20减去0.8的差除以4个0.3的和，商是多少？
<gadget id="calculator">20 - 0.8</gadget>
<output>19.2</output>

<gadget id="calculator">0.3 * 4</gadget>
<output>1.2</output>

<gadget id="calculator">19.2 / 1.2</gadget>
<output>16</output>

<result>16</result>