一位生物学家向一庄园主借钱100元，奴隶主说：“只要年利100%，一百、一千年后还都可以。”于是生物学家拿到了100元。协议上写千年后的子孙（女），还给奴隶主子孙（女）100×21000元钱。庄园主很高兴：“哈哈，千年之后他的子孙（女）多是我的子孙（女）的奴隶。” A biologist borrowed $ 100 from a manor who said: “As long as the annual profit is 100%, one hundred, one thousand years later, everything is ok.” So the biologist got 100 yuan. The agreement to write thousands of years after the descendants (female), also gave the slave owners (female) 100 × 21000 yuan of money. Manor Lord is happy: “haha, a thousand years later his children and grandchildren are mostly slaves to my children and grandchildren.”