Master Zhang went to the gas station to refuel. He knew that the fuel tank of his car was 9dm long, 4dm wide and 5dm high. How much will it cost to fill this mailbox with exactly half a tank of 90# oil? (The price of 90# oil is 5.89 yuan per liter)
张师傅到加油站加油，他知道自己车的油箱，里面长9dm，宽4dm，高5dm．如果把这个邮箱正好加半箱90#油，需要付多少钱？(90#油每升价5.89元)
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">9 * 4 * (5/2) * 5.89</gadget>
<output>530.1</output>

<result>530.1</result>