A 20-meter wire weighs 5 kg. If a bundle of the same wire weighs 100 kg, how many meters is the bundle of wire?
一种铁丝20米重5千克，如果一捆同样的铁丝100千克，这捆铁丝长多少米？
<gadget id="calculator">20 / 5</gadget>
<output>4</output>

<gadget id="calculator">4 * 100</gadget>
<output>400</output>

<result>400</result>