800 cartons of beverages are shipped in 5 times. The first 4 times are 158 cartons each time. How many cartons will be shipped in the fifth time?
800箱饮料分5次运完，前4次每次运158箱，第五次要运多少箱？
<gadget id="calculator">158 * 4</gadget>
<output>632</output>

<gadget id="calculator">800 - 632</gadget>
<output>168</output>

<result>168</result>