Barney can perform 45 sit-ups in one minute. Carrie can do twice as many sit-ups per minute as Barney can.  And Jerrie can do 5 more sit-ups per minute than Carrie can do.  If Barney does sit-ups for 1 minute, and Carrie does sit-ups for two minutes, and Jerrie does sit-ups for three minutes, what would be the combined total number of sit-ups performed?
Carrie can do 2*45=
<gadget id="calculator">2*45</gadget>
<output>90</output>
90 sit-ups per minute.
Jerrie can do 90+5=
<gadget id="calculator">90+5</gadget>
<output>95</output>
95 sit-ups per minute.
In two minutes, Carrie would perform 90*2-180 sit-ups.
And in three minutes, Jerrie would perform 3 * 95=
<gadget id="calculator">3*95</gadget>
<output>285</output>
285 sit-ups.
Thus, in the scenario described, in total, the three would perform 45+180+285=
<gadget id="calculator">45+180+285</gadget>
<output>510</output>
510 sit-ups.

<result>510</result>