chore: reference to The Hitchhiker's Guide to the Galaxy

At the end of the book, they multiply 6 * 7 :)

docs/topics/coroutine-context-and-dispatchers.md

@@ -420,14 +420,14 @@ fun main() = runBlocking(CoroutineName("main")) {
     val v1 = async(CoroutineName("v1coroutine")) {
         delay(500)
         log("Computing v1")
-        252
+        6
     }
     val v2 = async(CoroutineName("v2coroutine")) {
         delay(1000)
         log("Computing v2")
-        6
+        7
     }
-    log("The answer for v1 / v2 = ${v1.await() / v2.await()}")
+    log("The answer for v1 * v2 = ${v1.await() * v2.await()}")
 //sampleEnd    
 }
 ```
@@ -443,7 +443,7 @@ The output it produces with `-Dkotlinx.coroutines.debug` JVM option is similar t
 [main @main#1] Started main coroutine
 [main @v1coroutine#2] Computing v1
 [main @v2coroutine#3] Computing v2
-[main @main#1] The answer for v1 / v2 = 42
+[main @main#1] The answer for v1 * v2 = 42
 ```
 
 <!--- TEST FLEXIBLE_THREAD -->