What is the difference between the sum of 1.2 and 0.6 after removing them?
用1.2与0.6的和去除它们的差列式为多少．
<gadget id="calculator">1.2 - 0.6</gadget>
<output>0.6</output>

<gadget id="calculator">1.2 + 0.6</gadget>
<output>1.8</output>

<gadget id="calculator">0.6 / 1.8</gadget>
<output>0.333333</output>

<result>0.333333</result>