4 kilometers 80 meters = how many kilometers.
4千米80米=多少千米．
<gadget id="calculator">80 / 1_000</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">(2/25) + 4</gadget>
<output>102/25 = around 4.08</output>

<result>102/25 = around 4.08</result>