The show Magic King was on the air for 10 seasons and 20 episodes per season for the first half of seasons and 25 for the second half of the show.  How many total episodes were there?
Half the number of shows is 10/2=
<gadget id="calculator">10/2</gadget>
<output>5</output>
5 seasons.
So the first 5 seasons contributed 5*20=
<gadget id="calculator">5*20</gadget>
<output>100</output>
100 episodes.
The second 5 seasons contributed 5*25=
<gadget id="calculator">5*25</gadget>
<output>125</output>
125 episodes.
So there were a total of 100+125=
<gadget id="calculator">100+125</gadget>
<output>225</output>
225 episodes.

<result>225</result>