diff --git a/unpack.go b/unpack.go
index 997b332..503a516 100644
--- a/unpack.go
+++ b/unpack.go
@@ -61,9 +61,9 @@ func Unpack(str string) (string, error) {
 			}
 		case number:
 			if unicode.IsDigit(char) {
-				var n = strconv.Itoa(numOfRepeat)
-				numOfRepeat, _ = strconv.Atoi(n + string(char))
-				repStr, err := repeatRune(runeArray[i-2], numOfRepeat)
+				var n = strconv.Itoa(numOfRepeat) + string(char)
+				numOfRepeat, _ = strconv.Atoi(n)
+				repStr, err := repeatRune(runeArray[i-len(n)], numOfRepeat)
 				if err != nil {
 					// Если функция repeatRune возвращает ошибку, удаляем последний символ из результата.
 					res := result.String()
diff --git a/unpack_test.go b/unpack_test.go
index 5f7af3e..5ecf2de 100644
--- a/unpack_test.go
+++ b/unpack_test.go
@@ -56,6 +56,7 @@ func TestStringContainsNumber(t *testing.T) {
 	}{
 		{input: "aaa10b", expected: "aaaaaaaaaaaab"},
 		{input: "a12b4", expected: "aaaaaaaaaaaabbbb"},
+		{input: "a100", expected: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},
 	}
 	for _, tc := range testStrings {
 		t.Run(tc.input, func(t *testing.T) {