Teacher Wang is going to buy a commercial house with a price of 300,000 yuan with a loan. The bank stipulates that a down payment of 20% is required for buying a house with a loan.
王老师准备贷款购买一套售价30万元的商品房，银行规定贷款买房必须首付20%，王老师要买这套房必须首付多少万元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<result>6</result>