John needs to replace his shoes so he decides to buy a $150 pair of Nikes and a $120 pair of work boots.  Tax is 10%.  How much did he pay for everything?
The shoes cost $150 + $120 = $
<gadget id="calculator">150+120</gadget>
<output>270</output>
270.
The tax was $270 * .1 = $
<gadget id="calculator">270*.1</gadget>
<output>27</output>
27.
So the total cost was $270 + $27 = $
<gadget id="calculator">270+27</gadget>
<output>297</output>
297.

<result>297</result>