今有散钱不知其数，作七十七陌穿之，欠五十凑穿，若作七十八陌穿之，不多不少。问钱数若干？
解：
\[\because x\equiv27(mod77), x\equiv0(mod78),\\ \therefore x\equiv27\times78(mod77\times78)\]
流程图
graph TD;
A-->B;
A-->C;
B-->D;
C-->D;
时序图
sequenceDiagram
participant Alice
participant Bob
Alice->John: Hello John,how are you?
loop Healthcheck
John->John: Fight against hypochondria
end
Note right of John: Rational thoughts
prevail... John-->Alice: Great! John->Bob: How about you? Bob-->John: Jolly good!
prevail... John-->Alice: Great! John->Bob: How about you? Bob-->John: Jolly good!
甘特图
gantt
dateFormat YYYY-MM-DD
title Adding GANTT diagram functionality to mermaid
section A section
Completed task :done, des1, 2014-01-06,2014-01-08
Active task :active, des2, 2014-01-09, 3d
Future task : des3, after des2, 5d
Future task2 : des4, after des3, 5d
section Critical tasks
Completed task in the critical line :crit, done, 2014-01-06,24h
Implement parser and jison :crit, done, after des1, 2d
Create tests for parser :crit, active, 3d
Future task in critical line :crit, 5d
Create tests for renderer :2d
Add to mermaid :1d
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