How many meters is less (1/4) than 280 meters?
比280米少(1/4)是多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">280 * (1/4)</gadget>
<output>70</output>

<gadget id="calculator">280 - 70</gadget>
<output>210</output>

<result>210</result>