In the foreign exchange rate of a certain month in 2005, 100 yen can be exchanged for 7.2 yuan. In this way, how much yen is needed to exchange 0.072 million yuan.
2005年某月的外汇汇率中，100日元可兑换7.2元人民币，照这样，兑换0.072万元人民币需要多少日元．
<gadget id="calculator">0.072 * 10_000</gadget>
<output>720</output>

<gadget id="calculator">720 / 7.2</gadget>
<output>100</output>

<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>

<result>10_000</result>