The turnover of a shopping mall last month was 4.2 million yuan. The 5% tax rate is called business tax. How much business tax should the shopping mall pay last month?
某商场上个月的营业额是420万元，按5%的税率叫营业税，商场上个月应交营业税多少万元．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">420 * (1/20)</gadget>
<output>21</output>

<result>21</result>