Update README.md

dankogai · Feb 8, 2016 · 7756706 · 7756706
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 Protocol-Oriented Number System in Pure Swift
 
 ![typetree](./typetree.png)
+
+## SYNOPSIS
+
+````swift
+let bn = BigInt(2) ** 128
+// 340282366920938463463374607431768211456
+let bq = BigInt(1).over(bn)
+// (1/340282366920938463463374607431768211456)
+let bz = bq + bq.i
+// ((1/340282366920938463463374607431768211456)+(1/340282366920938463463374607431768211456).i)
+bz + bz
+// ((1/170141183460469231731687303715884105728)+(1/170141183460469231731687303715884105728).i)
+bz - bz
+// ((0/1)+(0/1).i)
+bz * bz
+// ((0/1)+(1/57896044618658097711785492504343953926634992332820282019728792003956564819968).i)
+bz / bz
+// ((1/1)+(0/1).i)
+````