A cuboid fuel tank, measured from the inside, has a length of 8dm, a width of 5dm, and a height of 2dm. If the unit price of diesel is 5.02 yuan per liter, how much does it cost to fill up this empty tank?
一个长方体油箱，从里面量，长是8dm，宽是5dm，高是2dm．如果每升柴油的单价是5.02元，那么把这个空油箱加满需要多少元？
<gadget id="calculator">8 * 5 * 2</gadget>
<output>80</output>

<gadget id="calculator">5.02 * 80</gadget>
<output>401.6</output>

<result>401.6</result>