There are 3 factories ordering a total of 300 copies of Liaoning Daily, with each factory ordering a minimum of 99 copies and a maximum of 101 copies. How many different ways are there in total?
有3个工厂共订300份辽宁日报，每个工厂最少订99份，最多订101份．一共有多少种不同的订法．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">1 + 6</gadget>
<output>7</output>

<result>7</result>