diff --git a/app/src/main/java/keijumt/devandroid/viewmodel/AsyncViewModel.kt b/app/src/main/java/keijumt/devandroid/viewmodel/AsyncViewModel.kt
index a7306a8..9a976b1 100644
--- a/app/src/main/java/keijumt/devandroid/viewmodel/AsyncViewModel.kt
+++ b/app/src/main/java/keijumt/devandroid/viewmodel/AsyncViewModel.kt
@@ -2,6 +2,8 @@
 
 import android.os.AsyncTask
 import keijumt.devandroid.common.Task
+import kotlinx.coroutines.experimental.async
+import kotlinx.coroutines.experimental.launch
 import javax.inject.Inject
 
 class AsyncViewModel @Inject constructor() : BaseViewModel() {
@@ -16,6 +18,14 @@
     }
 
     fun coroutine() {
+        launch {
+            val result = calc(3).await() * calc(5).await()
+            println(result)
+        }
+    }
+
+    fun calc(num: Int) = async {
+        return@async num * num
     }
 
     fun rx() {