Mara has 12 bags with 2 marbles in each bag. Markus has 2 bags with 13 marbles in each bag. How many more marbles does Markus have?
Mara has 2 x 12 = 
<gadget id="calculator">2*12</gadget>
<output>24</output>
24 marbles.
Markus has 2 x 13 = 
<gadget id="calculator">2*13</gadget>
<output>26</output>
26 marbles.
Markus has 26 - 24 = 
<gadget id="calculator">26-24</gadget>
<output>2</output>
2 more marbles than Mara.

<result>2</result>