Maddison has 5 boxes with 50 marbles in each box. Then she gets 20 marbles from her friend. How many marbles does she have now?
Maddison has 5 x 50 = 
<gadget id="calculator">5*50</gadget>
<output>250</output>
250 marbles from her boxes.
So she has a total of 250 + 20 = 
<gadget id="calculator">250+20</gadget>
<output>270</output>
270 marbles now.

<result>270</result>