第24章 周髀数字
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在守备严密的下宫之中，却突然遇袭，虞喜和穆夏大惊失色，连忙大喊着保护主上，抽剑挥戈就要将那人击杀。
“且慢动手！”赵无恤连忙阻止了他们。
待那个怪影靠近后，他们才看清楚，竟是平常特别注重仪表的计吏侨。
他怎么变成这副惨状了？
计侨神态有些痴迷癫狂，他也认出了赵无恤，便不由分说凑了过来，脏乎乎的双手紧紧抓住轺车的车栏，生怕赵无恤走掉。
“无恤小君子？是无恤小君子！我……我算出来了，算出来了！”
此时的他，仿佛在裸身洗澡时突然领悟了浮力原理的阿基米德，正处于极度亢奋状态。
赵无恤十分同情地看着计侨，只见他嘴唇龟裂，头发散乱，浑身沙土，下裳都跪破好几个洞，对这位春秋数学家不由得产生了一丝……愧疚？
因为昨天他喜于得了领地和兵符，一高兴，愣是把这位还在拼命割圆的数学家给忘了！
“小君子，你的割圆术果然有用，我花了一天一夜，不吃不睡，整整割了，割到了三千零二十四边形啊！最后终于得到了那个求圆积步的约率！”
赵无恤更加佩服了，天可怜见，计侨可是用那繁杂的算筹慢慢完成了这个伟大工程，工作量绝对不小，估计算棍都用了近万根，摆满了整个二进的院子吧。
计侨慢慢冷静了下来，他像是急于在数学老师面前炫耀算术能力的小学狗，忙不迭地报上了那串数字，然后用一种期待的眼神看着赵无恤。
这是在等待他的……表扬？
嗯答得不错，下个月给你一朵小红花？然后摸摸头？
不过赵无恤听罢却沉吟了，3.1415，这是计侨得出的结果，也是后世魏晋时代刘徵首创割圆法作出的最初答案。
但是，还不够完美。
“先生，你算的已经十分接近正确了。”
计侨的脸色像霜打的茄子，接近正确？这么说，还是没算对？作为一个数科专家，没有什么比做错算术题更沮丧的了。
于是赵无恤拉着计侨进了屋子，让女婢取块幘巾给他擦了擦脸，这才在一块木简上用毛笔写下了一串神秘的符号，3.1415926。
计侨张大了嘴，他苦思冥想，费心费力割了一天一夜的结果，赵无恤一瞬间就写出来了。
扑通，高傲的计侨猛地跪地，名义上还是他学生的赵无恤不敢托大，连忙避让，也朝计侨行礼。
“先生何必如此，会折杀小子的。”
“请小君子教我这神秘算学！
“神秘算学？好吧，我允了，允了还不行么，先生快起来吧，再这样，真会折小子寿命的。”赵无恤心里却乐开了花，他知道，自己未来的第一位重要宰臣，马上就要入瓮了。
可以这么说，下宫和周边各小邑共计两千多户人家的财政，乃至于赵氏百万人口上计，就掌握在计侨腰间的那袋算筹上。有了他为助力，治理成邑，赵无恤又多了几份胜算，可以说，是捡了块瑰宝啊！
屋内昏暗，让侍女在旁掌着宫灯，无恤和计侨则在竹席上相对而坐。
既然再过一千年，阿三才能发明后世的阿拉伯数字，于是赵无恤就毫不客气地剽窃来自己用了。至于发明者，他也不居功，而是直接推给了那位据说是创作了周髀算经，在数科上颇有造诣的周公旦。
赵无恤故作神秘地说道：“先生，其实，小子曾梦到过周文公，他教给了我这一套数字，我暂且将其命名为……周髀数字！”
“周髀数字？”听上去好厉害的样子，计侨重重地头，他对赵无恤的陈述十分信服。这世上的大能们，时不时会梦到古之贤人，听说鲁国的贤士孔丘也经常梦周公。
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