On Monday the post office delivered 425 letters. On Tuesday they delivered 17 more than one-fifth as many as Monday. On Wednesday they delivered 5 more than twice as many as they delivered on Tuesday. How many letters did the post office deliver Monday - Wednesday?
Monday = 
<gadget id="calculator">425</gadget>
<output>425</output>
425 letters.
Tuesday = (1/5) * 425 + 17 = 
<gadget id="calculator">(1/5)*425+17</gadget>
<output>102</output>
102 letters.
Wednesday = 2 * 102 + 5 = 
<gadget id="calculator">2*102+5</gadget>
<output>209</output>
209 letters.
Total = 425 + 102 + 209 = 
<gadget id="calculator">425+102+209</gadget>
<output>736</output>
736 letters.
The post office delivered 736 letters on Monday - Wednesday.

<result>736</result>