7.5:6=(7.5-6):(6-how much)
7.5：6=(7.5-6)：(6-多少)
<gadget id="calculator">7.5 - 6</gadget>
<output>1.5</output>

<gadget id="calculator">7.5 / 1.5</gadget>
<output>5</output>

<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">6 - (6/5)</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>