A tractor trailer has a load of 50000 pounds.  10% of the weight gets unloaded at the first store, and 20% of the remaining load is removed at the second store.  How much weight, in pounds, is left on the truck after the two deliveries?
First Store:50000(.10)=
<gadget id="calculator">5000</gadget>
<output>5_000</output>
5000
50000-5000=
<gadget id="calculator">50000-5000</gadget>
<output>45_000</output>
45000 pounds.
Second Store:45000(.20)=9000
45000-9000=
<gadget id="calculator">45000-9000</gadget>
<output>36_000</output>
36000 pounds.

<result>36_000</result>