diff --git a/laba_21.py b/laba_21.py
new file mode 100644
index 0000000..12639bb
--- /dev/null
+++ b/laba_21.py
@@ -0,0 +1,21 @@
+import numpy as np
+import time
+
+n = 2048
+A = np.random.rand(n, n) + 1j * np.random.rand(n, n)
+B = np.random.rand(n, n) + 1j * np.random.rand(n, n)
+C = np.zeros((n, n), dtype=np.complex128)
+
+start = time.time()
+for i in range(n):
+    for j in range(n):
+        for k in range(n):
+            C[i, j] += A[i, k] * B[k, j]
+end = time.time()
+
+t = end - start
+c = 2 * n**3
+mflops = c / t * 1e-6
+
+print(f"Время: {t:.2f} сек")
+print(f"Производительность: {mflops:.2f} MFLOPS")