Sally sews 4 shirts on Monday, 3 shirts on Tuesday, and 2 shirts on Wednesday.  Each shirt has 5 buttons.  How many buttons does Sally need to sew all the shirts?
Total number of shirts Sally sews is 4 + 3 + 2 = 
<gadget id="calculator">4+3+2</gadget>
<output>9</output>
9 shirts.
The total number of buttons she needs is 9 x 5 = 
<gadget id="calculator">9*5</gadget>
<output>45</output>
45 buttons.

<result>45</result>