There are 35 cows and 35 sheep in Xingnong Farm. Each cow eats 70.8 kilograms of grass every week, and each sheep eats 35.2 kilograms of grass every week. If the grass is 0.2 yuan per kilogram, how much does the farm need to buy grass every week? ?
兴农饲养场有牛和羊各35只，每只牛每星期吃70.8千克草，每只羊每星期吃35.2千克草，如果每千克草0.2元，那么这个饲养场每星期买草需要多少元？
<gadget id="calculator">70.8 + 35.2</gadget>
<output>106</output>

<gadget id="calculator">106 * 35</gadget>
<output>3_710</output>

<gadget id="calculator">3_710 * 0.2</gadget>
<output>742</output>

<result>742</result>