diff --git a/src/main/kotlin/lesson_2/lesson2_task4.kt b/src/main/kotlin/lesson_2/lesson2_task4.kt
new file mode 100644
index 0000000..f2faa5a
--- /dev/null
+++ b/src/main/kotlin/lesson_2/lesson2_task4.kt
@@ -0,0 +1,18 @@
+package lesson_2
+
+fun main() {
+    val crystalOre = 7
+    val ironOre = 11
+    baf20CrystalOre(crystalOre)
+    baf20IronOre(ironOre)
+}
+
+fun baf20CrystalOre(value: Int) {
+    val baf20 = value * 20/100
+    println("Количество \"бонусных\" crystal ore: $baf20")
+}
+
+fun baf20IronOre(value: Int) {
+    val baf20 = value * 20/100
+    println("Количество \"бонусных\" iron ore: $baf20")
+}
\ No newline at end of file