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关于28335无符号乘法问题

使用28335定义了一个全局Uint32变量Result,在main函数进行赋值Result=9600*4;结果提示warning:

Multiple markers at this line
- integer operation result is out of range
- integer conversion resulted in a change of sign

看手册,28335支持16*16乘法:

但是将4改为4.0或者4.1就不会出现warning了,实验凡是4以上的整数就会有warning,但是类似8.1就不会。

请问:

1.错误出在哪儿了?

2.什么叫做双MAC?

3.是不是无符号整型相乘与浮点相乘用的不同的乘法器?

4.无符号整型与浮点乘法器最大支持的位数?

期望您的回答。在此感谢。