The average daily usage of disposable foam plastic lunch boxes in my country is 30 million, and 0.012 tons of plastic are used to manufacture 10,000 foam plastic lunch boxes, and each ton of plastic can process 200,000 plastic rulers for primary school students to learn. How many thousands of plastic rulers for elementary school students can be processed from the plastic used to manufacture the disposable foam plastic lunch boxes used every day in our country?
我国一次性泡沫塑料饭盒的使用量日均3000万个，每制造1万个泡沫塑料饭盒要用去0.012吨塑料，每吨塑料可加工20万把小学生学习用的塑料尺．制造我国每天使用的一次性泡沫塑料饭盒所用去的塑料可以加工多少万把小学生学习用的塑料尺？
<gadget id="calculator">0.012 * 3_000 * 20</gadget>
<output>720</output>

<result>720</result>