Alfred is storing a tonne of maize each month for the next 2 years.  If 5 tonnes are stolen and 8 tonnes are given to him as a donation, how many tonnes of maize does he have at the end of the 2 years.
Before his maize is stolen, the maize he stores at the end of 1 year is 12*1= 
<gadget id="calculator">12*1</gadget>
<output>12</output>
12 tonnes of maize.
Before his maize is stolen, the maize he stores at the end of 2 years is 12*2= 
<gadget id="calculator">12*2</gadget>
<output>24</output>
24 tonnes of maize.
After his maize is stolen, he is left with 24-5=
<gadget id="calculator">24-5</gadget>
<output>19</output>
19 tonnes of maize.
After he receives the maize donation, he has 19+8=
<gadget id="calculator">19+8</gadget>
<output>27</output>
27 tonnes of maize.

<result>27</result>