Steve has a bank account that earns 10% interest every year. He puts $100 in it, and then 10 each year. How much money is in it after two years?
After one year it earns $10 in interest because 100 x .1 = 
<gadget id="calculator">100*.1</gadget>
<output>10</output>
10.
It has $120 in it after a year because 100 + 10 + 10 = 
<gadget id="calculator">100+10+10</gadget>
<output>120</output>
120.
In the second year it earns $12 in interest because 120 x .1 = 
<gadget id="calculator">120*.1</gadget>
<output>12</output>
12.
In the second year it has $142 in it because 120 + 12 + 10 = 
<gadget id="calculator">120+12+10</gadget>
<output>142</output>
142.

<result>142</result>