3 hours 45 minutes = how many hours.
3小时45分=多少小时．
<gadget id="calculator">45 / 60</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3 + (3/4)</gadget>
<output>15/4 = around 3.75</output>

<result>15/4 = around 3.75</result>