<p>设<img alt="" width="128" height="94" style="width: 100%;height: auto;" src="https://learnfile.20230611.cn/learnAppQuestion/4e/86/4e86b878a5f12dd26346132b5c14f890.png">利用分块矩阵计算<img alt="" width="25" height="25" style="width: 100%;height: auto;" src