Adding 7 more to 0.593 is 0.6.
把0.593再增加7个多少就是0.6．
<gadget id="calculator">0.6 - 0.593</gadget>
<output>0.007</output>

<gadget id="calculator">0.007 / 7</gadget>
<output>0.001</output>

<result>0.001</result>