The turnover of a supermarket last month was 4.5 million yuan, and the sales tax was paid at a rate of 5%. How much is the sales tax payable by this supermarket last month?
某超市上个月的营业额是450万元，按5%的税率缴营业税，这个超市上个月应缴营业税多少万元．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">450 * (1/20)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>