refactor: Avoid manual chrono casts with * or /

diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index 6377e3fa..d9cf3920 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -5398,13 +5398,13 @@ void PeerManagerImpl::CheckForStaleTipAndEvictPeers()
 
 void PeerManagerImpl::MaybeSendPing(CNode& node_to, Peer& peer, std::chrono::microseconds now)
 {
-    if (m_connman.ShouldRunInactivityChecks(node_to, std::chrono::duration_cast<std::chrono::seconds>(now)) &&
+    if (m_connman.ShouldRunInactivityChecks(node_to, now) &&
         peer.m_ping_nonce_sent &&
         now > peer.m_ping_start.load() + TIMEOUT_INTERVAL)
     {
         // The ping timeout is using mocktime. To disable the check during
         // testing, increase -peertimeout.
-        LogDebug(BCLog::NET, "ping timeout: %fs, %s", 0.000001 * count_microseconds(now - peer.m_ping_start.load()), node_to.DisconnectMsg());
+        LogDebug(BCLog::NET, "ping timeout: %fs, %s", Ticks<SecondsDouble>(now - peer.m_ping_start.load()), node_to.DisconnectMsg());
         node_to.fDisconnect = true;
         return;
     }
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 1619227a..9fd46cfc 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -771,7 +771,7 @@ QString formatPingTime(std::chrono::microseconds ping_time)
 {
     return (ping_time == std::chrono::microseconds::max() || ping_time == 0us) ?
         QObject::tr("N/A") :
-        QObject::tr("%1 ms").arg(QString::number((int)(count_microseconds(ping_time) / 1000), 10));
+        QObject::tr("%1 ms").arg(QString::number(Ticks<std::chrono::milliseconds>(ping_time)));
 }
 
 QString formatTimeOffset(int64_t time_offset)