4 friends are running a 4 x 100 relay race.  Mary ran first and took twice as long as Susan.  Susan ran second and she took 10 seconds longer than Jen.  Jen ran third and finished in 30 seconds.  Tiffany ran the last leg and finished in 7 seconds less than Mary.  How many seconds did it take the team to finish the race?
Susan's time was 30 seconds + 10 seconds = 
<gadget id="calculator">30+10</gadget>
<output>40</output>
40 seconds.
Mary's time was 40 seconds * 2 = 
<gadget id="calculator">40*2</gadget>
<output>80</output>
80 seconds.
Tiffany's time was 80 seconds - 7 seconds = 
<gadget id="calculator">80-7</gadget>
<output>73</output>
73 seconds.
The total time for the team was 80 seconds + 40 seconds + 30 seconds + 73 seconds = 
<gadget id="calculator">80+40+30+73</gadget>
<output>223</output>
223 seconds.

<result>223</result>