Mike decides to develop a plot of land.  He bought 200 acres for $70 per acre.  After development, he sold half of the acreage for $200 per acre.  How much profit did he make?
He bought the land for 200*70=$
<gadget id="calculator">200*70</gadget>
<output>14_000</output>
14000.
He sold 200/2=
<gadget id="calculator">200/2</gadget>
<output>100</output>
100 acres.
He got 100*200=$
<gadget id="calculator">100*200</gadget>
<output>20_000</output>
20,000 from selling this.
So he made a profit of 20,000-14,000=$
<gadget id="calculator">20000-14000</gadget>
<output>6_000</output>
6,000.

<result>6_000</result>