A 4 meter long iron rod weighs 3 kg, what is the average weight per meter?
一根4米长的铁棒重3千克，平均每米重多少千克．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>