Rita received a 70 dollars gift card for a coffee store. She used it in buying some coffee that cost 8.58 dollars per pound. After buying the coffee , she had 35.68 dollars left on her card. How many pounds of coffee did she buy?
<gadget id="calculator">70 - 35.68</gadget>
<output>34.32</output>

<gadget id="calculator">34.32 / 8.58</gadget>
<output>4</output>

<result>4</result>