Andrew bakes 200 mini cinnamon rolls and 300 mini blueberry muffins. A normal cinnamon roll has 600 calories and a normal blueberry muffin has 450 calories. If a mini pastry has 1/3rd of the calories of a normal version, how many calories do the pastries he baked have?
First find the number of calories in a mini cinnamon roll: 600 calories / 3 = 
<gadget id="calculator">600/3</gadget>
<output>200</output>
200 calories.
Then multiply that number by the number of mini cinnamon rolls: 200 calories/roll * 200 rolls = 
<gadget id="calculator">200*200</gadget>
<output>40_000</output>
40000 calories.
Then find the number of calories in a mini blueberry muffin: 450 calories / 3 = 
<gadget id="calculator">450/3</gadget>
<output>150</output>
150 calories.
Then multiply that number by the number of mini blueberry muffins: 150 calories/muffin * 300 muffins = 
<gadget id="calculator">150*300</gadget>
<output>45_000</output>
45000 calories.
Then add the number of calories from each type of pastry to find the total number of calories: 45000 calories + 40000 calories = 
<gadget id="calculator">45000+40000</gadget>
<output>85_000</output>
85000 calories.

<result>85_000</result>