A steel pipe is 3.8 meters long and is sawn into sections every 0.7 meters. How many meters are left after sawing into 5 sections? How many
一根钢管长3.8米，每0.7米锯成一段，锯成5段后余下的钢管还有多少米？多少
<gadget id="calculator">5 * 0.7</gadget>
<output>3.5</output>

<gadget id="calculator">3.8 - 3.5</gadget>
<output>0.3</output>

<result>0.3</result>